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Determining Bile Duct Density in the Mouse Liver
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Does primary biliary cirrhosis cluster in time?

Colin R Muirhead1, Oliver F W James2, Samantha J Ducker2

  • 1Institute of Health & Society, Newcastle University, Newcastle upon Tyne, UK.

Spatial and Spatio-Temporal Epidemiology
|November 5, 2015
PubMed
Summary
This summary is machine-generated.

Investigating primary biliary cirrhosis (PBC) in northeast England revealed significant yearly variations in diagnosis dates. This suggests a potential environmental factor, but not widespread mini-epidemics.

Keywords:
AetiologyInfectionPrimary biliary cirrhosisTemporal clustering

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Area of Science:

  • Hepatology and Gastroenterology
  • Epidemiology
  • Environmental Health

Background:

  • The exact cause of primary biliary cirrhosis (PBC) remains unknown.
  • Previous research indicated space-time clustering and seasonal diagnosis patterns for PBC.
  • These findings suggested a potential role for transient or seasonally fluctuating environmental factors.

Purpose of the Study:

  • To investigate the involvement of a temporally varying environmental agent in PBC.
  • To analyze population-based PBC data for temporal clustering patterns.
  • To assess temporal variations in PBC diagnosis dates between 1987 and 2003 in northeast England.

Main Methods:

  • Analysis of population-based PBC data from northeast England (1987-2003).
  • Utilized an adaptation of the Potthoff and Whittinghill method for temporal analysis.
  • Examined temporal variation at the annual level of aggregation.

Main Results:

  • Significant temporal variation was detected in PBC diagnosis dates at the annual aggregation level.
  • No evidence of general irregular temporal clustering was found within periods shorter than one year.
  • Results do not support widespread mini-epidemics but do not rule out localized sporadic outbreaks.

Conclusions:

  • The findings support the hypothesis of a seasonally varying environmental factor influencing PBC.
  • The data provides limited evidence for widespread mini-epidemics but leaves open the possibility of localized outbreaks.
  • Further research is recommended to identify specific environmental agents potentially linked to PBC.